Hydrofast Cold Water Reverse Osmosis Water Filter Countertop

• Amazon now offers the Hydrofast C100 desktop reverse osmosis water filter, delivering 50°F (10°C) refreshing purified water instantly, now priced at $284.99 (original $399.99).
• Prime members get free two-day shipping, and regular members get free shipping on orders over $35 within the contiguous U.S.
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Editor's Pick: The C100 desktop cold-water RO water filter produces 50°F (10°C) refreshing purified water within just 5 seconds of pressing the cold water button—no need to wait for fridge cooling and completely avoids secondary contamination. Its 6-stage reverse osmosis filtration removes 99.9% of harmful substances while replenishing minerals like calcium, magnesium, and potassium at the end for healthier, better-tasting water. The side-mounted tank makes refilling easy, saves space, and suits most countertops. With a 3:1 pure-to-waste water ratio, the filter can produce up to 1,056 gallons (4,000 liters) of pure water, reducing over 8,000+ plastic bottles annually—plus, waste water can be reused for other purposes. The tool-free design means you just plug it in, add water, and start using.